SPACI score report for 3kco in ASTRAL 2.07:

WARNING! The SPACI score for this entry is not valid. This is not an X-ray structure, so the resolution and R-factor listed may be arbitrary and not valid.

PDB Entry: 3kco
SPACI score: 0.44 (not valid)
AEROSPACI score: 0.44 (not valid)

Experiment type: NEUT+
Resolution: 1.8
R-factor: 0.273
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 1.051
WCK2 WHAT_CHECK Ramachandran: -0.768
WCK3 WHAT_CHECK Chi angles: 0.045
WCK4 WHAT_CHECK Backbone: 3.609

Note: Here are links to pages about PROCHECK and WHAT_CHECK.

Here is the full WHAT_CHECK report on this protein (linked from the WHAT_CHECK site).